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Linux根分区扩容
|Linux
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LVM根分区

磁盘分区扩容

查看lvm卷组

VG #PV #LV #SN Attr   VSize  VFree
cl   1   2   0 wz--n- 19.00g    0

添加磁盘并将分区转换为lvm分区，新建的lvm分区为sda3

Disk /dev/sda: 107.4 GB, 107374182400 bytes, 209715200 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk label type: dos
Disk identifier: 0x000af7fc

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *        2048     2099199     1048576   83  Linux
/dev/sda2         2099200    41943039    19921920   8e  Linux LVM
/dev/sda3        41943040   209715199    83886080   8e  Linux LVM

创建pv

pvcreate /dev/sda3

扩展vg

vgextend cl /dev/sda3

查看扩展的vg

[root@acai ~]# vgs
  VG #PV #LV #SN Attr   VSize  VFree 
  cl   2   2   0 wz--n- 98.99g 80.00g

扩展lv

[root@acai ~]# lvextend -l +100%FREE /dev/cl/root 
  Size of logical volume cl/root changed from 17.00 GiB (4351 extents) to 96.00 GiB (24575 extents).
  Logical volume cl/root successfully resized.

刷新分区表(如果分区的文件系统为xfs，需要使用xfs_growfs)

#ext4
resize2fs /dev/mapper/bigcloud--enterprise--linux--for--euler-root
#xfs
[root@acai ~]# xfs_growfs /dev/mapper/cl-root 
meta-data=/dev/mapper/cl-root    isize=512    agcount=4, agsize=1113856 blks
         =                       sectsz=512   attr=2, projid32bit=1
         =                       crc=1        finobt=0 spinodes=0
data     =                       bsize=4096   blocks=4455424, imaxpct=25
         =                       sunit=0      swidth=0 blks
naming   =version 2              bsize=4096   ascii-ci=0 ftype=1
log      =internal               bsize=4096   blocks=2560, version=2
         =                       sectsz=512   sunit=0 blks, lazy-count=1
realtime =none                   extsz=4096   blocks=0, rtextents=0
data blocks changed from 4455424 to 25164800

验证根分区

[root@acai ~]# df -h
Filesystem           Size  Used Avail Use% Mounted on
/dev/mapper/cl-root   96G  1.3G   95G   2% /
devtmpfs             1.9G     0  1.9G   0% /dev
tmpfs                1.9G     0  1.9G   0% /dev/shm
tmpfs                1.9G  8.6M  1.9G   1% /run
tmpfs                1.9G     0  1.9G   0% /sys/fs/cgroup
/dev/sda1           1014M  139M  876M  14% /boot
tmpfs                378M     0  378M   0% /run/user/0

磁盘扩容

这种方式适用于创建lvm时没有给磁盘创建分区，直接将磁盘格式化为lvm格式的情况。
查看磁盘大小

lsblk
NAME              MAJ:MIN RM  SIZE RO TYPE MOUNTPOINT
sda                 8:0    0  200G  0 disk
└─sda1              8:1    0  200G  0 part /
sdb                 8:16   0    2T  0 disk
└─vg_data-lv_data 253:0    0  500G  0 lvm  /data
sr0                11:0    1  474K  0 rom

查看vg

[root@ecs-03968264-007 ~]#  vgs
File descriptor 3 (socket:[335678288]) leaked on vgs invocation. Parent PID 2415349: -bash
  VG      #PV #LV #SN Attr   VSize    VFree
  vg_data   1   1   0 wz--n- <500.00g    0

查看lv

[root@ecs-03968264-007 ~]#  lvs
File descriptor 3 (socket:[335678288]) leaked on lvs invocation. Parent PID 2415349: -bash
  LV      VG      Attr       LSize    Pool Origin Data%  Meta%  Move Log Cpy%Sync Convert
  lv_data vg_data -wi-ao---- <500.00g

查看pv

[root@ecs-03968264-007 ~]#  pvdisplay /dev/sdb
File descriptor 3 (socket:[335678288]) leaked on pvdisplay invocation. Parent PID 2415349: -bash
  --- Physical volume ---
  PV Name               /dev/sdb
  VG Name               vg_data
  PV Size               500.00 GiB / not usable 4.00 MiB
  Allocatable           yes (but full)
  PE Size               4.00 MiB
  Total PE              127999
  Free PE               0
  Allocated PE          127999
  PV UUID               LLONwh-Ggf1-EZei-veko-q74E-kJyI-eAgJ8u

扩容pv

[root@ecs-03968264-007 ~]#  pvresize /dev/sdb
File descriptor 3 (socket:[335678288]) leaked on pvresize invocation. Parent PID 2415349: -bash
  Physical volume "/dev/sdb" changed
  1 physical volume(s) resized or updated / 0 physical volume(s) not resized

查看pv是否扩容

[root@ecs-03968264-007 ~]#  pvdisplay /dev/sdb
File descriptor 3 (socket:[335678288]) leaked on pvdisplay invocation. Parent PID 2415349: -bash
  --- Physical volume ---
  PV Name               /dev/sdb
  VG Name               vg_data
  PV Size               1.95 TiB / not usable 3.00 MiB
  Allocatable           yes
  PE Size               4.00 MiB
  Total PE              511999
  Free PE               384000
  Allocated PE          127999
  PV UUID               LLONwh-Ggf1-EZei-veko-q74E-kJyI-eAgJ8u

查看vg是否扩容

[root@ecs-03968264-007 ~]#  vgs
File descriptor 3 (socket:[335678288]) leaked on vgs invocation. Parent PID 2415349: -bash
  VG      #PV #LV #SN Attr   VSize VFree
  vg_data   1   1   0 wz--n- 1.95t 1.46t

扩容lv

[root@ecs-03968264-007 ~]#  lvextend -l +100%FREE /dev/vg_data/lv_data
File descriptor 3 (socket:[335678288]) leaked on lvextend invocation. Parent PID 2415349: -bash
  Size of logical volume vg_data/lv_data changed from <500.00 GiB (127999 extents) to 1.95 TiB (511999 extents).
  Logical volume vg_data/lv_data successfully resized.

查看lv是否扩容

[root@ecs-03968264-007 ~]#  lvs
File descriptor 3 (socket:[335678288]) leaked on lvs invocation. Parent PID 2415349: -bash
  LV      VG      Attr       LSize Pool Origin Data%  Meta%  Move Log Cpy%Sync Convert
  lv_data vg_data -wi-ao---- 1.95t

刷新分区表

[root@ecs-03968264-007 ~]#  xfs_growfs /data
meta-data=/dev/mapper/vg_data-lv_data isize=512    agcount=4, agsize=32767744 blks
         =                       sectsz=512   attr=2, projid32bit=1
         =                       crc=1        finobt=1, sparse=1, rmapbt=0
         =                       reflink=1
data     =                       bsize=4096   blocks=131070976, imaxpct=25
         =                       sunit=0      swidth=0 blks
naming   =version 2              bsize=4096   ascii-ci=0, ftype=1
log      =internal log           bsize=4096   blocks=63999, version=2
         =                       sectsz=512   sunit=0 blks, lazy-count=1
realtime =none                   extsz=4096   blocks=0, rtextents=0

确认扩容

[root@ecs-03968264-007 ~]#  df -h
Filesystem                   Size  Used Avail Use% Mounted on
devtmpfs                      16G     0   16G   0% /dev
tmpfs                         16G     0   16G   0% /dev/shm
tmpfs                         16G  1.8M   16G   1% /run
tmpfs                         16G     0   16G   0% /sys/fs/cgroup
/dev/sda1                    197G  7.3G  182G   4% /
tmpfs                         16G   18M   16G   1% /tmp
/dev/mapper/vg_data-lv_data  2.0T  319G  1.7T  16% /data

标准分区

查看当前根分区

[root@rke ~]# lsblk
NAME   MAJ:MIN RM  SIZE RO TYPE MOUNTPOINT
sda      8:0    0   40G  0 disk
├─sda1   8:1    0    1G  0 part /boot
├─sda2   8:2    0    2G  0 part [SWAP]
└─sda3   8:3    0   17G  0 part /
sr0     11:0    1  906M  0 rom

重建sda3根分区分区表

[root@rke ~]# fdisk /dev/sda
Welcome to fdisk (util-linux 2.23.2).

Changes will remain in memory only, until you decide to write them.
Be careful before using the write command.


Command (m for help): p

Disk /dev/sda: 42.9 GB, 42949672960 bytes, 83886080 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk label type: dos
Disk identifier: 0x0000266a

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *        2048     2099199     1048576   83  Linux
/dev/sda2         2099200     6293503     2097152   82  Linux swap / Solaris
/dev/sda3         6293504    41943039    17824768   83  Linux

Command (m for help): d
Partition number (1-3, default 3):
Partition 3 is deleted

Command (m for help): n
Partition type:
   p   primary (2 primary, 0 extended, 2 free)
   e   extended
Select (default p):
Using default response p
Partition number (3,4, default 3):
First sector (6293504-83886079, default 6293504):
Using default value 6293504
Last sector, +sectors or +size{K,M,G} (6293504-83886079, default 83886079):
Using default value 83886079
Partition 3 of type Linux and of size 37 GiB is set

Command (m for help): w
The partition table has been altered!

Calling ioctl() to re-read partition table.

WARNING: Re-reading the partition table failed with error 16: Device or resource busy.
The kernel still uses the old table. The new table will be used at
the next reboot or after you run partprobe(8) or kpartx(8)
Syncing disks.

查看根分区磁盘格式

[root@rke ~]# mount|grep sda3
/dev/sda3 on / type xfs (rw,relatime,attr2,inode64,noquota)

动态扩容根分区

[root@rke ~]# xfs_growfs /dev/sda3
meta-data=/dev/sda3              isize=512    agcount=4, agsize=1114048 blks
         =                       sectsz=512   attr=2, projid32bit=1
         =                       crc=1        finobt=0 spinodes=0
data     =                       bsize=4096   blocks=4456192, imaxpct=25
         =                       sunit=0      swidth=0 blks
naming   =version 2              bsize=4096   ascii-ci=0 ftype=1
log      =internal               bsize=4096   blocks=2560, version=2
         =                       sectsz=512   sunit=0 blks, lazy-count=1
realtime =none                   extsz=4096   blocks=0, rtextents=0
文章作者: 慕容峻才
文章链接: https://www.acaiblog.top/Linux根分区扩容/
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